STUPIDSID
1(a)
Describe any five field tests that can be done on cement.
10 M
1(b)
Draw a flow chart for the manufacturing of cement by wet process.
10 M
2(a)
What do you understand by grading anslysis? Explain how it is done for fine aggregates.
10 M
2(b)
Mention the maximum impact value for wearing non-wearing surfaces and also explain how impact test is done for coarse aggregate.
10 M
3(a)
What is workability? Explain its importance in fresh concrete.
10 M
3(b)
List out any ten methods adopted for transportation of concrete.
10 M
4(a)
Explain the flocculation and de-flocculation of cement gains under the influence of superplasticizer, with the help of a diagram.
10 M
4(b)
Briefly explain the effect of fly ash on fresh and hardened concrete.
10 M
5(a)
Discuss any five factors affecting the strength of concrete.
10 M
5(b)
Discuss any five factors affecting the strength of results.
10 M
6(a)
List out any ten factors contributing to cracks in concrete.
10 M
6(b)
List out any five methods each for controlling sulphate attack and corrosion of steel due to chloride attack.
10 M
7(a)
Write short notes on the factors affecting the following :
a. Modulus of elasticity b. Shrinkage
c. Creep d. Workability
a. Modulus of elasticity b. Shrinkage
c. Creep d. Workability
20 M
8(a)
With the help of the following design stipulations and test data for materials design a M20 grade concrete:
a. Design stipulations:
i) Characteristic compressive strength at 28 days= 20 N/mm2
ii) Maximum size of aggregate = 20 mm (angular)
iii) Degree of quality control = good
iv) Degree of quality control = good
v) Type of exposure = mild
b. Test data for materials:
i) Specific gravity of cement = 3.15;
ii) Specific gravity of coarse aggregate = 2.60;
iii) Specific gravity of fine aggregate = 2.60;
iv) Water absorption of coarse aggragate = 0.5%
v) Water absorption of fine aggregate = 1.0%
vi) Free moisture in coarse aggregate = Nil;
vii) Free moisture in fine aggregate = 2.0 %;
viii) Grading of fine aggregate = Zone III
Any missing data may be suitably assumed.
a. Design stipulations:
i) Characteristic compressive strength at 28 days= 20 N/mm2
ii) Maximum size of aggregate = 20 mm (angular)
iii) Degree of quality control = good
iv) Degree of quality control = good
v) Type of exposure = mild
b. Test data for materials:
i) Specific gravity of cement = 3.15;
ii) Specific gravity of coarse aggregate = 2.60;
iii) Specific gravity of fine aggregate = 2.60;
iv) Water absorption of coarse aggragate = 0.5%
v) Water absorption of fine aggregate = 1.0%
vi) Free moisture in coarse aggregate = Nil;
vii) Free moisture in fine aggregate = 2.0 %;
viii) Grading of fine aggregate = Zone III
Any missing data may be suitably assumed.
20 M
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